Method of making weldless elevator links



April 29, 1930. 5., w, MOORE 1,756,376

METHOD OF MAKING WE LDLESS ELEVATOR LINKS Filed Nov. 18, 1927 .271 VE/V7' 0R GEORGE M fiomz.

Patented Apr. 29 1930' UNITED STATESPATENT OFFICE GEORGE "W. MOORE, OFLONG BEACH, CALIFORNIA, ASSIGNOR Tb R. E. MOORE, OF

PIEDMONT, CALIFORNIA METHOD or MAKING ,wELnLEss ELEVATOR LINKSApp1ication filed November 18,

An object of my invention is to provide a novel method offorming'weldless elevator. links whereby a link is provided which willnot readily break under severe strain, and

5 which is less expensive to manufacture. Another object of my inventionis to provide a weldless link which is formed with a very fewoperations, such operations bjeing simple and quickly performed.

Other objects, advantagea'and features of invention may appear in theaccompanying drawings, the-subjoined detailed descr1p-:

- :hood of a fracture occurring tions, and the appended claims. In thedrawing-- Fig.1, is a side elevation of the bar from which the link ismade.

Fig. 2, is a side elevation the next stage of manufacture.

Fig. 3, is a side elevation of the the third step of completion.

Fig. 4, is a planview of the completed'bar. Fig. 5, is a side elevationof the same; Fig. 6, is a side elevation of my links in position on anelevator.

Referring more particularly to the-drawing, my weldless link is formedin a series of steps starting with a bar 1, of substantially uniformdiameter through its length.

This bar being then moved through the rollers formingthe structure asshown. in Fig.

2, consists of a central circular cross section 2, the ends 3, 4, beingof substantially the same diameter as he bar 1, with which I start.During this rolling operation, the

bar is elongated to the required length, which length varies from 6 feetto 8 feet, more or less. The rolling operation is so controlled thateach bar is made exactly the same length;

this insures a uniform strain on the two links which support theelevator.

The next step consists in flattening the ends 3, 4, as shown at 5, 6.The central section 2 remains undisturbed. The next operation consistsin cutting the openings 7 8, to form the eyes 9, 10. The opening 7 whichextends over the elevator lugs is smaller in size than the opening 8,which is engaged by the block hook, that is the openin 7 is smaller indimension along the longitudinal axis of the link than the opening 8.

'ofthe bar form cross sectional Serial No. 234,228.

The upper end of the eye 10, is flattened as at 11, and is bent'upwardlyat an angle. The purpose of-the. flattening is to provide more metalalong the line-of greatest strain, and

the' bending is' to enable the twolinks to fit more closely-together,when in use on an elevatoras shown inFig. 65'

The central section 2, tapers radually outwardly into the eyes 9, 10, sot at no abrupt angles are formed, across which a break can occur. -Thegradual tapering .distributes the strain more equally and there is lesslikeliat the point where the eyes andthe central section come to ether.

it is obvious that the above described method can be accomplished byforging the bar into shape'as well as by rolling the same,

and also it may be desirable to make the end 3, slightly smaller indiameter than the end 4, by'reason of the smaller than the eye 10.

When the links are in actual use, one of the operators stands aconsiderable distance above the floor of the derrick on a speciallyprovided platform, and as the elevator passes him, hereaches. out andgrasps the links to pull the pipe over into the rack. To provide aconvenient hand grasp, a pair of loops 12,

12, are secured at either'end of the link by either welding or othersuitable processes,

fact that the eye 9, is

and a cable is then secured in the loops and extends between them thusforming a hand grasp for the operator.

In the rolling operation, and in the cutting of the eyes 9,10, it isdesirable that the cross sectional area of the central section 2, beabout the same as the sum of the cross sectionalarea of both sides ofthe loop, thus making all parts of thelink substantially the a same intensile strain.

Having described my invention, I claim:

1. A method of forming a weldless elevator link which consists inrolling {that of unidiameter into a section of reduced central diameter,both ends remaining the same dimension in cross sectionas the originalbar, then flattening the ends and then cutting apertures in both ends toform eyes.

2. A method of forming a weldless elem-- tor link which consists inrolling a bar of uniform cross sectional diameter into a section ofreduced central diameter, both ends remaining the'same dimension incross section as the original rod, then flattening the ends and thencutting apertures in both ends to form eyes, the aperture in one eyebeing of greater longitudinal dimension than the opening in the othereye, then flattening the outer end of the longer eye and bending theflattened portion u wardly,at an angle.

3. A method of orming a weldless elevator link which consists in cuttinga bar into 5 lengths less than the final length of the link,-

then rolling the bar to form a lesser diameter,

centralsection, said rolling extending the bar to the length of thecompleted link, the ends being the same diameter as the original bar,then flattening the ends and then cutting apertures in the'fiattenedends to form eyes.

- 4. A method of forming a weldless elevator linkwhich'consists incutting a bar into lengths less than the final length of the link,

then rolling the bar to form a lesser diameter central section, saidrolling extending the bar to the length of the completed link, the endsbeing the same diameter as the original bar, then flattening the endsand' then cutting apertures in the flattened ends to form eyes, the eyesections tapering gradually into the central section and one eyebeing'of greater longitudinal dimension than the other.

In testimony whereof, I aflix my signature.

GEORGE W. MOORE.

